Leithian: In the Abyss is a single-player action role-playing game in which players explore a dark fantasy world, engaging in real-time combat and character customization. In this game, players follow the story of a hero who ventures into the mysterious Abyss to uncover hidden truths and confront formidable enemies, set against a richly detailed South Korean-inspired fantasy universe. It stands out with its intense combat system, deep narrative, and unique blend of traditional Korean mythology with modern RPG elements, offering advanced gameplay mechanics such as skill trees, equipment upgrades, and strategic combat tactics.